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. 2019 Dec 18;15:455. doi: 10.1186/s12917-019-2210-4

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Maximum likelihood phylogenetic tree of segment 4 encoding the hemagglutinin (HA) protein gene of South African H6N2 chicken and reference viruses. Green = Gauteng Province; Blue = North West Province; Red = KwaZulu-Natal Province; clear = reference strains. Viruses sequenced in the present study are in boldface. Genetic clusters are labelled A, B and C